A favorite, but these are all names from screenplays Stallone has written -- though he must've liked having that name for himself (also: Sylvester "Sly" Stallone totally sounds like a name Stallone would write).

Thanks on the Lee Christmas tip. Maybe that moves him up the list. Barnes Ross (Stallone's character's name in the movie) was a boxing champion (duh) who was also a heavily decorated World War II veteran and later developed (and beat) a bad heroin habit.